Thread core for dyeing operations and method of making same



C. K. DUNLAP June 7, 1932'.

THREAD CORE FOR DYEING OPERATIONS AND METHOD OF MAKING SAME Filed May 5,1928 Patented June 7, 1932' UNITED STATES PATENT oEElcE CHARLES K.DUNLAP, F HARTSVILLE, SOUTH CAROLINA THREAD CORE FOR DYEIN G- OPERATIONSAND METHOD OF MAKING- SAME `Application led May 3,

The present invention relates to cores for thread packages or windingsand particular- 1y to cores for supporting such thread packages orwindings while they are undergoing the process or processes of dyeing.

In the textile industry it is found necessary to color a very largepercentage of the.

thread used, prior to the time of`its incorporation in the finishedfabric. While some of the thread is dyed in skeins, by fai;4 the greaterproportion is dyed in compact packages or windings of thread uponsupporting cores. Such supporting cores have generally been of metal andtubular in shape, the core and its package being subjected tothe actionof the dye liquor while positioned in a tank. Various methods oftreating the thread with the dye liquor have been devised and are nowbeing practiced, but in every case the supporting core itself comes inContact with the liquor and this liquor is usually very severe in itsaction upon ordinary metallic tubes, and, even tubes of special metals,being usually heated to high temperatures and containing potash andcaustic materials. The metallic tubes will corrode, with the possibleexception of Monel metal which however, is comparatively expensive, andfurthermore there is a tendency for cer-tain salts to form adjacent thesurface of the metallic tube which causes, in many instances, variationsin shade between the inner-most layers Aof the thread winding and theremainder thereof.

It is the object of the present invention to provide an improved corefor thread packages or .windings comprising a tube, cone or cylinder ofspecially treated paper which lshall be cheap to manufacture,mechanically strong and stiff, resistant to asatisfactory degree to theaction of the dye liquor and lighter and more convenient to handle thanmetallic tubes or tubes of composition materials.

Furtherobjects and features of the invention will be apparent from thefollowing description taken in connection with the accompanying drawingin which Fig. 1 is an elevational View of one form of core made inaccordance with the principles of the present invention, a portion ofthe core being broken away` to illustrate the construction 192s'. serialNo. 276,492.

thereof and the method of forming the same. Fig. 2 is a section on theline 2 2 of Fig. 1.

In accordance with the present invention a tube indicated generally at10 of hard paper stock is wound with a special paste 11 and'is 2preferably then given a treatment which further hardens it and whichalso renders it more impervious to the action of the dye liquor. It willbe understood that, were an ordinary paper tube subjected to the actionof dye liquor, it would be almost immediately softened and further, thepaste, by means of which thev several convolutions of the tube aresecured to one another, would be eaten away so that the tube would loseits form or completely unroll. The paste which I employ contains rubberlatex and I have-found that a paste mixed substantially as follows isentirely satisfactory in practice.

To 3 quarts of starch paste (about 10% solids) heated to a temperatureof about 160``y F., is added one quart of liquid rubber latex (33%solids). The ingredients are thoroughly mixed together and the paste isthen ready for` use. It will be appreciated of course that theproportions of latex tostarch paste may be varied considerably to suitdifferent operating conditions andethat the invention of course is notlimited to the exact proportions set forth above.

In the formation of a tube the paper blank 12 is coated withthe latexpaste 11 on both sides in the usual manner, then wound tightly upon amandrel so that its walls are several plies in thickness, dischargedfrom the mandrel and dried. The resulting tube 10 is then placed on aperforating machine which perforates its wall at a large number ofpoints y 13 so that dye liquor may pass through the apertures thusformed and reach the inner layers of the thread winding. In/most dyeingprocesses the dye liquor is either forced or drawn through suchperforations and in some instances is alternately discharged outwardlythrough the thread package under pressure and then drawn inwardly thro hthe thread package and perforated tube l- I held in this bath for aperiod of from. 15 minutes to a period of 60 minutes. The sulphurpenetrates the paper fibres, entering the paper fibres through the wallsof the perfo rations ofthe tube, which circular Walls are of course notcoated with thev latex paste, having been formed subsequently to therolling of the tube. The sulphur penetrates the tube by travellinglongitudinally of the paper comprising the same. The period which thetube is kept .in the sulphur bath will depend upon thecharacter of thepaper and the degree of hardening which it is hoped to realize by theimmersion.` When lifted from the bath the excess sulphur dra-ins off ofthe outer and inner tubular cylindrical lsurfaces of the tube, thissulphur not adhering to any perceptible degree to the latex paste coatedWalls.

When the tube is dry it may be used and, Without further treatment Willbe found to provide a satisfactory core for a thread package in a dyeingoperation. If the dyeing process to which 'it will be exposed however isvery severe a further treatment may be given it to render it still moreresistant to the action ofthe dye liquor. Thus it may be immersed in asolution of rubber produced in accordance with the process outlined inPat-` ent No. 1,627,725, issued May 10, 1927 to Charles E. Bradley andWillis A. Gibbons. This solution includes rubber combined withhydrochloric acid and chlorine and is found 'to impart to paper articlesa'W'ater-proof surface, and a surfaceparticularly resistant to theaction of dye liquorsrat high temperatures.

The tube provided by the process above lmentioned, either withorlwithout the final step, maintains itsV form during the dyeingprocess, that is, is mechanically strong vand stiff. It is light inWeight, comparatively inexpensive as compared with metallic andcomposition tubes, and in general is a much more practical article ofmanufacture for the purpose intended than the metallic or composi-Vtion1 tubes which have heretofore for the most part been utilized. Itwill be obvious, to one skilled in the art that minor vari'ations in theprocess may be made Without departing from 'its basic teachings or thescope of the claim defining the same.

Having thusy described the invention, what is claimed as new and desiredto be secured by Letters Patent is:

The method of manufacturing paper cores adapted to support threadpackages or Windings during dyeing and other operations in the textileindustry, Which comprises coating the surfaces of a paper sheet with alatex containing paste, Winding the sheet into aJ tube,

the Wall of which is several plies in thickness, the plies being securedtogether by the latex containing paste, drying the tube thus formed,perforating the tube to provide open-

